.site-header,
  .hero,
  .feature-preview,
  .features,
  .faq,
  .site-footer {
    width: min(1180px, calc(100% - 40px));
    margin-inline: auto;
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 24px;
    padding: 18px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(18px);
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
    text-decoration: none;
  }

  .brand img {
    width: 44px;
    height: 44px;
    border-radius: 8px;
    box-shadow: 0 0 28px rgba(255, 94, 88, 0.22);
  }

  .brand span {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: -0.01em;
  }

  .site-header nav {
    display: flex;
    align-items: center;
    gap: 34px;
  }

  .site-header nav a {
    color: var(--muted);
    font-size: 0.84rem;
    font-weight: 700;
    text-decoration: none;
    transition: color 160ms ease;
  }

  .site-header nav a:hover,
  .site-header nav a:focus-visible {
    color: var(--text);
  }

  .app-store {
    display: inline-flex;
    width: max-content;
    border-radius: 8px;
    box-shadow: 0 16px 42px rgba(0, 0, 0, 0.28);
    transition: transform 180ms ease, box-shadow 180ms ease;
  }

  .app-store:hover,
  .app-store:focus-visible {
    transform: translateY(-2px);
    box-shadow: 0 22px 60px rgba(25, 217, 231, 0.22);
  }

  .app-store-header {
    justify-self: end;
  }

  .app-store-large img {
    width: 180px;
    height: 60px;
  }

  .hero {
    position: relative;
    display: grid;
    grid-template-columns: 0.95fr 1.1fr;
    gap: 44px;
    min-height: 690px;
    padding: 76px 0 58px;
  }

  .hero::before {
    position: absolute;
    inset: 6% -10% auto;
    z-index: -1;
    height: 58%;
    content: "";
    background:
      linear-gradient(120deg, rgba(255, 47, 99, 0.14), transparent 32%),
      linear-gradient(270deg, rgba(25, 217, 231, 0.16), transparent 48%);
    filter: blur(16px);
  }

  .hero-copy {
    align-self: center;
  }

  .hero h1 {
    max-width: 640px;
    margin: 0;
    font-size: clamp(3.55rem, 7vw, 6.9rem);
    font-weight: 800;
    line-height: 0.92;
    letter-spacing: -0.035em;
  }

  .hero h1 span {
    display: block;
    margin-bottom: 0.14em;
    background: linear-gradient(92deg, var(--ruby), var(--amber));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
  }

  .hero-copy > p {
    max-width: 560px;
    margin: 28px 0 0;
    color: #dbe8ef;
    font-size: clamp(1.15rem, 2vw, 1.45rem);
    line-height: 1.55;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 24px 32px;
    margin-top: 34px;
  }

  .platforms {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    color: #dce8ee;
    font-size: 0.84rem;
    font-weight: 700;
  }

  .platforms span {
    display: inline-flex;
    align-items: center;
    min-height: 36px;
    padding: 0 14px;
    border: 1px solid rgba(255, 255, 255, 0.13);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.035);
  }

  .device-stage {
    position: relative;
    align-self: center;
    min-height: 610px;
  }

  .phone {
    position: absolute;
    width: min(31vw, 280px);
    max-width: 42%;
    border-radius: 32px;
    filter: drop-shadow(0 34px 44px rgba(0, 0, 0, 0.52));
  }

  .phone-main {
    left: 50%;
    z-index: 3;
    width: min(33vw, 300px);
    max-width: 46%;
    transform: translateX(-50%);
  }

  .phone-left {
    top: 86px;
    left: 5%;
    z-index: 2;
    transform: rotate(-3deg);
    opacity: 0.94;
  }

  .phone-right {
    top: 86px;
    right: 0;
    z-index: 1;
    transform: rotate(3deg);
    opacity: 0.94;
  }

  .watch-card {
    position: absolute;
    right: 5%;
    bottom: 62px;
    z-index: 4;
    display: grid;
    gap: 3px;
    width: 148px;
    padding: 20px;
    border: 1px solid rgba(57, 255, 136, 0.34);
    border-radius: 8px;
    background: linear-gradient(150deg, rgba(3, 12, 16, 0.94), rgba(7, 24, 30, 0.9));
    box-shadow: 0 18px 50px rgba(0, 0, 0, 0.5), 0 0 24px rgba(57, 255, 136, 0.13);
  }

  .watch-card span,
  .watch-card small {
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 700;
  }

  .watch-card strong {
    color: var(--green);
    font-size: 1.18rem;
    line-height: 1.05;
  }

  .feature-preview {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1px;
    margin-top: -34px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--line);
  }

  .feature-preview div {
    display: grid;
    gap: 8px;
    padding: 28px;
    background: rgba(5, 14, 21, 0.88);
  }

  .feature-preview strong {
    color: var(--text);
    font-size: 1rem;
  }

  .feature-preview span {
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.55;
  }

  .features,
  .faq {
    padding: 96px 0 0;
  }

  .section-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 30px;
  }

  .section-heading h2 {
    margin: 0;
    color: var(--text);
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -0.03em;
  }

  .section-heading p {
    max-width: 520px;
    margin: 0;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.65;
  }

  .feature-list {
    display: grid;
    gap: 16px;
  }

  .feature-row {
    position: relative;
    display: grid;
    grid-template-columns: 260px 76px minmax(0, 1fr);
    align-items: center;
    gap: 34px;
    min-height: 210px;
    overflow: hidden;
    padding: 28px 44px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background:
      linear-gradient(90deg, rgba(255, 47, 99, 0.08), transparent 30%),
      linear-gradient(270deg, rgba(25, 217, 231, 0.1), transparent 36%),
      rgba(5, 14, 21, 0.78);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  }

  .feature-row-flip {
    grid-template-columns: minmax(0, 1fr) 76px 260px;
  }

  .feature-row-flip > img,
  .feature-row-flip > .feature-photo {
    order: 3;
  }

  .feature-row-flip .feature-icon {
    order: 2;
  }

  .feature-row-flip > div:last-child {
    order: 1;
  }

  .feature-row img {
    width: 210px;
    justify-self: center;
    align-self: start;
    margin-top: -42px;
    border-radius: 28px;
    filter: drop-shadow(0 20px 28px rgba(0, 0, 0, 0.5));
  }

  .feature-icon {
    display: grid;
    place-items: center;
    width: 76px;
    height: 76px;
    border: 1px solid rgba(25, 217, 231, 0.42);
    border-radius: 8px;
    color: var(--cyan);
    font-size: 1rem;
    font-weight: 800;
    box-shadow: 0 0 28px rgba(25, 217, 231, 0.14);
  }

  .feature-icon-warm {
    border-color: rgba(255, 138, 54, 0.46);
    color: var(--amber);
    box-shadow: 0 0 28px rgba(255, 138, 54, 0.16);
  }

  .feature-icon-ruby {
    border-color: rgba(255, 47, 99, 0.5);
    color: var(--ruby);
    box-shadow: 0 0 28px rgba(255, 47, 99, 0.16);
  }

  .feature-row h3 {
    margin: 0 0 12px;
    color: var(--text);
    font-size: clamp(1.35rem, 2.1vw, 1.9rem);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.025em;
  }

  .feature-row p {
    max-width: 560px;
    margin: 0;
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.66;
  }

  .feature-photo {
    display: flex;
    flex-direction: column;
    justify-content: end;
    min-height: 150px;
    padding: 20px;
    border: 1px solid var(--line-warm);
    border-radius: 8px;
    background:
      linear-gradient(to top, rgba(3, 7, 12, 0.94), rgba(3, 7, 12, 0.18)),
      radial-gradient(circle at 30% 20%, rgba(255, 138, 54, 0.42), transparent 32%),
      linear-gradient(135deg, rgba(25, 217, 231, 0.16), rgba(255, 47, 99, 0.14));
  }

  .feature-photo strong {
    color: var(--text);
    font-size: 1.25rem;
    line-height: 1.1;
  }

  .feature-photo span {
    margin-top: 6px;
    color: #c6d3dc;
    font-size: 0.83rem;
  }

  .map-photo {
    border-color: var(--line);
    background:
      linear-gradient(to top, rgba(3, 7, 12, 0.94), rgba(3, 7, 12, 0.1)),
      linear-gradient(120deg, rgba(25, 217, 231, 0.2), transparent),
      repeating-linear-gradient(40deg, rgba(255, 255, 255, 0.08) 0 1px, transparent 1px 18px);
  }

  .popular-photo {
    border-color: rgba(255, 47, 99, 0.46);
    background:
      linear-gradient(to top, rgba(3, 7, 12, 0.94), rgba(3, 7, 12, 0.18)),
      radial-gradient(circle at 20% 25%, rgba(255, 47, 99, 0.42), transparent 32%),
      radial-gradient(circle at 80% 20%, rgba(25, 217, 231, 0.22), transparent 34%);
  }

  .weather-photo {
    border-color: var(--line);
    background:
      radial-gradient(circle at 72% 18%, rgba(25, 217, 231, 0.42), transparent 30%),
      linear-gradient(145deg, rgba(7, 24, 30, 0.96), rgba(3, 7, 12, 0.94));
  }

  .weather-photo strong {
    font-size: 3rem;
  }

  .faq-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  details {
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    background: rgba(5, 14, 21, 0.76);
  }

  summary {
    cursor: pointer;
    padding: 20px 22px;
    color: var(--text);
    font-size: 0.98rem;
    font-weight: 700;
    line-height: 1.35;
  }

  details p {
    margin: 0;
    padding: 0 22px 22px;
    color: var(--muted);
    font-size: 0.94rem;
    line-height: 1.6;
  }

  details a {
    color: var(--cyan);
    font-weight: 700;
  }

  .site-footer {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px 24px;
    align-items: center;
    margin-top: 96px;
    padding: 34px 0 46px;
    border-top: 1px solid rgba(255, 255, 255, 0.09);
    color: var(--muted);
  }

  .site-footer .brand {
    grid-row: span 2;
  }

  .site-footer p {
    margin: 0;
    font-size: 0.84rem;
    line-height: 1.5;
    text-align: right;
  }